IssueTracker

I used this before. https://gist.github.com/egorikftp/898ef570175a3b80bfb8f88631fb82a2#file-currentfraction-kt

@OptIn(ExperimentalMaterialApi::class)
val BottomSheetScaffoldState.currentFraction: Float
    get() {
        val fraction = bottomSheetState.progress.fraction
        val targetValue = bottomSheetState.targetValue
        val currentValue = bottomSheetState.currentValue

        return when {
            currentValue == Collapsed && targetValue == Collapsed -> 0f
            currentValue == Expanded && targetValue == Expanded -> 1f
            currentValue == Collapsed && targetValue == Expanded -> fraction
            else -> 1f - fraction
        }
    }

from https://www.droidcon.com/2021/08/24/how-to-animate-bottomsheet-content-using-jetpack-compose/

But the fraction and targetValue are not available in newer material lib version. So I changed to the solution provided by #1, and observed the same behavior. The requirement is simple: to have a value between 0 (collapsed) <-> 1 (expanded). It'll be good if the lib provides this value then we don't have to calculate by self.